Figure 1: Many significant results are truly exploratory, and many significant results are strictly confirmative. But some significant results are more relevant than mere exploratory. Some other significant results are confirmative only in tendency, but not from a strict point of view. A few studies are in between. Typically, metaanalyses are only confirmative in tendency, whilst screening investigations are always close to the exploratory pole. The diagram shows the results for 100 fictitious studies.